Lithium niobate (LN), an outstanding and versatile material, has influenced our daily life for
decades—from enabling high-speed optical communications that form the backbone of the …

Many breakthroughs in technologies are closely associated with the deep understanding
and development of new material platforms. As the main material used in microelectronics …

Low-loss photonic integrated circuits and microresonators have enabled a wide range of
applications, such as narrow-linewidth lasers and chip-scale frequency combs. To translate …

Laboratory optical atomic clocks achieve remarkable accuracy (now counted to 18 digits or
more), opening possibilities for exploring fundamental physics and enabling new …

Lithium niobate (LN), dubbed by many as the silicon of photonics, has recently risen to the
forefront of chip-scale nonlinear optics research since its demonstration as an ultralow-loss …

Periodically poled lithium niobate (PPLN) waveguides are a powerful platform for efficient
wavelength conversion. Conventional PPLN converters, however, typically require long …

Increasing demand for every faster information throughput is driving the emergence of
integrated photonic technology. The traditional silicon platform used for integrated …

Gallium phosphide (GaP) is an indirect-bandgap semiconductor used widely in solid-state
lighting. Despite numerous intriguing optical properties—including large χ (2) and χ (3) …

The commercial success of radio-frequency acoustic filters in wireless communication
systems has launched aluminum nitride (AlN) as one of the most widely used …

Optical-frequency synthesizers, which generate frequency-stable light from a single
microwave-frequency reference, are revolutionizing ultrafast science and metrology, but …